diff --git a/papaparse.js b/papaparse.js
index 5d09354..ea0a6af 100644
--- a/papaparse.js
+++ b/papaparse.js
@@ -255,7 +255,10 @@
 			if (_input.data instanceof Array)
 			{
 				if (!_input.fields)
-					_input.fields = _input.data[0] instanceof Array
+					_input.fields =  _input.meta && _input.meta.fields;
+
+				if (!_input.fields)
+					_input.fields =  _input.data[0] instanceof Array
 									? _input.fields
 									: objectKeys(_input.data[0]);